Package org.jgroups.demos.wb

Class Whiteboard

  • All Implemented Interfaces:
    java.awt.event.ActionListener, java.awt.event.ComponentListener, java.awt.event.FocusListener, java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, java.util.EventListener, javax.accessibility.Accessible, MembershipListener
    public class Whiteboard
extends java.applet.Applet
implements MembershipListener, java.awt.event.ActionListener, java.awt.event.ComponentListener, java.awt.event.FocusListener
    Shared whiteboard: members are represented by rectangles that contain their names and the OS/arch of the machine they are working on. The boxes can be moved by anyone and by clicking on them, messages can be sent to specific or all members. Whiteboard is both an application and an applet.
    Author:
    Bela Ban
    See Also:
    Serialized Form

    • Nested Class Summary

      • Nested classes/interfaces inherited from class java.applet.Applet

        java.applet.Applet.AccessibleApplet

      • Nested classes/interfaces inherited from class java.awt.Panel

        java.awt.Panel.AccessibleAWTPanel

      • Nested classes/interfaces inherited from class java.awt.Container

        java.awt.Container.AccessibleAWTContainer

      • Nested classes/interfaces inherited from class java.awt.Component

        java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

    • Field Summary

      Fields 
      Modifier and Type Field Description
      RpcDispatcher disp  
      static java.lang.String groupname  

      • Fields inherited from class java.awt.Component

        BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

      • Fields inherited from interface java.awt.image.ImageObserver

        ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

    • Constructor Summary

      Constructors 
      Constructor Description
      Whiteboard()  
      Whiteboard​(java.lang.String properties)  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void actionPerformed​(java.awt.event.ActionEvent e)  
      void addNode​(java.lang.String lbl, Address addr, int xloc, int yloc)  
      void block()
      Called (usually by the FLUSH protocol), as an indication that the member should stop sending messages.
      void componentHidden​(java.awt.event.ComponentEvent e)  
      void componentMoved​(java.awt.event.ComponentEvent e)  
      void componentResized​(java.awt.event.ComponentEvent e)  
      void componentShown​(java.awt.event.ComponentEvent e)  
      void destroy()  
      void displayMessage​(java.lang.String sender, java.lang.String msg)  
      void focusGained​(java.awt.event.FocusEvent e)  
      void focusLost​(java.awt.event.FocusEvent e)  
      void getState​(java.io.OutputStream ostream)  
      void init()  
      static void main​(java.lang.String[] args)  
      void moveNode​(Node n)  
      void removeNode​(java.lang.Object addr)  
      void repaint()  
      void setState​(java.io.InputStream istream)  
      void suspect​(Address obj)
      Called whenever a member is suspected of having crashed, but has not yet been excluded.
      void unblock()
      Called after the FLUSH protocol has unblocked previously blocked senders, and messages can be sent again.
      void viewAccepted​(View v)
      Called when a change in membership has occurred.

      • Methods inherited from class java.applet.Applet

        getAccessibleContext, getAppletContext, getAppletInfo, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, getParameterInfo, isActive, isValidateRoot, newAudioClip, play, play, resize, resize, setStub, showStatus, start, stop

      • Methods inherited from class java.awt.Panel

        addNotify

      • Methods inherited from class java.awt.Container

        add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getMousePosition, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paint, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setComponentZOrder, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, transferFocusDownCycle, update, validate, validateTree

      • Methods inherited from class java.awt.Component

        action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, requestFocusInWindow, reshape, revalidate, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setMixingCutoutShape, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Constructor Detail

      • Whiteboard

        public Whiteboard()

      • Whiteboard

        public Whiteboard​(java.lang.String properties)

    • Method Detail

      • getState

        public void getState​(java.io.OutputStream ostream)
              throws java.lang.Exception
        Throws:
        java.lang.Exception

      • setState

        public void setState​(java.io.InputStream istream)
              throws java.lang.Exception
        Throws:
        java.lang.Exception

      • init

        public void init()
        Overrides:
        init in class java.applet.Applet

      • destroy

        public void destroy()
        Overrides:
        destroy in class java.applet.Applet

      • repaint

        public void repaint()
        Overrides:
        repaint in class java.awt.Component

      • actionPerformed

        public void actionPerformed​(java.awt.event.ActionEvent e)
        Specified by:
        actionPerformed in interface java.awt.event.ActionListener

      • viewAccepted

        public void viewAccepted​(View v)
        Description copied from interface: MembershipListener
        Called when a change in membership has occurred. No long running actions, sending of messages or anything that could block should be done in this callback. If some long running action needs to be performed, it should be done in a separate thread.

        Note that on reception of the first view (a new member just joined), the channel will not yet be in the connected state. This only happens when JChannel.connect(String) returns.

        Specified by:
        viewAccepted in interface MembershipListener

      • block

        public void block()
        Description copied from interface: MembershipListener
        Called (usually by the FLUSH protocol), as an indication that the member should stop sending messages. Any messages sent after returning from this callback might get blocked by the FLUSH protocol. When the FLUSH protocol is done, and messages can be sent again, the FLUSH protocol will simply unblock all pending messages. If a callback for unblocking is desired, implement MembershipListener.unblock(). Note that block() is the equivalent of reception of a BlockEvent in the pull mode.
        Specified by:
        block in interface MembershipListener

      • unblock

        public void unblock()
        Description copied from interface: MembershipListener
        Called after the FLUSH protocol has unblocked previously blocked senders, and messages can be sent again. This callback only needs to be implemented if we require a notification of that.

        Note that during new view installation we provide guarantee that unblock invocation strictly follows view installation at some node A belonging to that view . However, some other message M may squeeze in between view and unblock callbacks. For more details see https://jira.jboss.org/jira/browse/JGRP-986

        Specified by:
        unblock in interface MembershipListener

      • moveNode

        public void moveNode​(Node n)

      • addNode

        public void addNode​(java.lang.String lbl,
                    Address addr,
                    int xloc,
                    int yloc)

      • removeNode

        public void removeNode​(java.lang.Object addr)

      • displayMessage

        public void displayMessage​(java.lang.String sender,
                           java.lang.String msg)

      • componentResized

        public void componentResized​(java.awt.event.ComponentEvent e)
        Specified by:
        componentResized in interface java.awt.event.ComponentListener

      • componentMoved

        public void componentMoved​(java.awt.event.ComponentEvent e)
        Specified by:
        componentMoved in interface java.awt.event.ComponentListener

      • componentShown

        public void componentShown​(java.awt.event.ComponentEvent e)
        Specified by:
        componentShown in interface java.awt.event.ComponentListener

      • componentHidden

        public void componentHidden​(java.awt.event.ComponentEvent e)
        Specified by:
        componentHidden in interface java.awt.event.ComponentListener

      • focusGained

        public void focusGained​(java.awt.event.FocusEvent e)
        Specified by:
        focusGained in interface java.awt.event.FocusListener

      • focusLost

        public void focusLost​(java.awt.event.FocusEvent e)
        Specified by:
        focusLost in interface java.awt.event.FocusListener

      • main

        public static void main​(java.lang.String[] args)